They still do it mate, in data centres, factories, and anywhere they have a shed load of cables. I suppose if they have a bunch of a hundred cables to tidy up, it will be cheaper to use string than god Knows how many cable ties, I would imagine too that it would be just as quick for them to do it this way. I've seen some places where it looks like artwork, these guys are so talented.

Thanks. And yes, there are a lot of good sleeving tutorials around. I have been wanting
to make one about the way I sleeved the wires in HELIOS, but just haven't had the time
or money to continue on that build and do a proper video on it. If things go well, it
might finally happen in the next few months though.